package thread;

/**
 * 互斥性
 * 当使用多个synchronized锁定多个代码片段，并且指定的同步监视器对象相同时，这些代码片段就是互斥的
 */
public class SyncDemo4 {
    public static void main(String[] args) {
        Foo foo = new Foo();
        Thread t1 = new Thread() {
            public void run() {
                foo.methodA();
            }
        };
        Thread t2 = new Thread() {
            public void run() {
                foo.methodB();
            }
        };
        t1.start();
        t2.start();
    }
}

class Foo {
    public synchronized void methodA() {
        try {
            Thread t = Thread.currentThread();
            System.out.println(t.getName() + ":正在执行A方法...");
            Thread.sleep(5000);
            System.out.println(t.getName() + ":A方法执行完毕");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    public synchronized void methodB() {
        try {
            Thread t = Thread.currentThread();
            System.out.println(t.getName() + ":正在执行B方法...");
            Thread.sleep(5000);
            System.out.println(t.getName() + ":B方法执行完毕");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}
